0x4e and 0x72: the audio codec circuit doesn't function is because L1's pad soldering not well. The root cause it that the footprint design from rc1 is 0603, and current we use a 0402 with zero ohm, from a more quantity run that we got this err : http://en.qi-hardware.com/wiki/File:M1_rc3_0x4e_L1-1.png

this is good condition that if I still get failure after resoldering, then I can take apart U17, then if the impedance of TP25 to gnd is still low, this definitely means that ball soldering under fpga is bad.

xiangfu, is there possible that we can use test image to help on testing for records into flash rom for 10 times when I press middle btn to boot up and some where that gui can let me save after rendering 30 seconds?